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LocalStack on

localstack.cloud github.com/localstack/localstack

2026.7.4 as measured in this run

Grade C
moderate divergence · coverage lowers this row to C
answers 14.8% of the suite differently from real DynamoDB
95.3% covered · 50 unsupported
Tier 1 · Core 6.3% diverges
100.0% covered
31 of 489 attempted
Tier 2 · Complete 16.0% diverges
84.9% covered 34 unsupported
36 of 191 attempted
Tier 3 · Strict 26.2% diverges
95.3% covered 16 unsupported
89 of 324 attempted

How it got here

LocalStack's history up to this run, ending on the figures above. Both are plotted because neither reads correctly alone: divergence falls when a target stops attempting an operation it used to get wrong, so a fall in the first plot is only an improvement if the second one holds. The target's own page carries the full history.

Divergence

LocalStack divergence up to 2026-08-15 0% 10% 20% divergence - lower is better 24 Apr 23 May 26 May 16 Jun 21 Jun 24 Jun 30 Jun 6 Jul 15 Jul 18 Jul 22 Jul 28 Jul 9 Aug 15 Aug 14.8%
Diverging on 14.8% of the suite as of 15 Aug, at worst 16.5% on 30 Jun. Lower is better, so a falling line is a target getting closer to real DynamoDB.

Coverage

LocalStack coverage up to 2026-08-15 94% 97% 100% coverage - higher is better 24 Apr 23 May 26 May 16 Jun 21 Jun 24 Jun 30 Jun 6 Jul 15 Jul 18 Jul 22 Jul 28 Jul 9 Aug 15 Aug 95.3%
Implementing 95.3% of the suite as of 15 Aug. Higher is better. This is the share of the suite's tests a target implements at all. A fail becoming a skip leaves both numerators over the same fixed denominator, so a fall here is matched point for point by a fall in divergence: withdrawal costs exactly as much coverage as it gains divergence.

Where it fell short on this date

The tests this run recorded as failing, each linked to its source at the commit that measured it. For the current picture, see this target's latest results, or every target in this run.